#include<iostream>
#include<set>
#include<string>
using namespace std;

void cmp() {
	return;
}

set<string> s; 
int main(void) {
	s.insert("Awjy");
	s.insert("nika");
	s.insert("Monkey D Lufei~");
	if(!s.count("Monkey")) {
		cout << "Doesn't exist Monkey D" << endl;
	}
	cout << "s.size = " << s.size() << endl;
	
	for(set<string>::iterator it = s.begin(); it != s.end(); it++) {
		cout << *it << endl;
	}
	
	return 0;
}
